D Data Socket; D Acc Socket - Icom IC-703 Instruction Manual

D DATA socket

DATA PIN No.
1 DATA IN
2
3
6 5
4 DATA OUT Data out terminal for 9600 bps operation only.
4 3
5 AF OUT
2 1
Rear panel view
6

D ACC socket

ACC PIN No. NAME
1 8 V
2 GND Connects to ground.
3 HSEND Goes to ground when transmitting.
4 BDT
4 3 2 1
8 7 6 5
5 BAND
12 11 10 9
13
6 ALC
Rear panel view
7 NC
q brown i gray
w red o white
8 13.8 V 13.8 V output when power is ON.
e orange !0 black
9 TKEY Key line for the optional AT-180.
r yellow !1 pink
t green !2 light
blue
y blue
10 FSKK Controls RTTY keying
u purple !3 light
green
11 MOD
12
13 SQLS
Color refers to the cable strands of the supplied cable.
• When connecting the ACC conversion cable (OPC-599)
4 3 2 1
8 7 6 5
12 11 10 9
13
Connect to ACC socket
NAME
Input terminal for data transmit. (1200 bps: AFSK/9600 bps: G3RUH, GMSK)
GND Common ground for DATA IN, DATA OUT and AF OUT.
PTT P PTT terminal for packet operation. Connect ground to transmit data.
Data out terminal for 1200 bps operation only.
Squelch out terminal. Becomes ground level when the transceiver receives a signal
which opens the squelch.
SQ
• To avoid unnecessary TNC transmission, connect squelch to the TNC to inhibit trans-
mission when receiving signals.
• Keep audio output at a normal level, otherwise a "SQ" signal will not be output.
DESCRIPTION
Regulated 8 V output.
Input/output pin.
(HF/50 MHz only)
When grounded, transmits.
Data line for the optional AT-180.
Band voltage output.
(Varies with amateur band)
ALC voltage input.
———
Modulator input.
Connects to a modulator.
AF detector output.
AF Fixed, regardless of [AF] position in
default settings.
Squelch output.
Goes to ground when squelch opens.
ACC 1
6
7
8
1
3
4
5
2
DESCRIPTION
Output voltage
Output current
———
Ground level
Output current
Input current (Tx)
———
Output voltage
Control voltage
Input impedance
———
Output current
———
"High" level
"Low" level
Output current
Input impedance
Input level
Output impedance : 4.7 kΩ
Output level
SQL open
SQL closed
ACC 2
q FSKK t AF
w GND y SQLS
e HSEND u 13.8 V
r MOD i ALC
PANEL DESCRIPTION
SPECIFICATIONS
: 8 V ±0.3 V
: Less than 10 mA
: –0.5 V to 0.8 V
: Less than 20 mA
: Less than 200 mA
: 0 to 8.0 V
: –4 V to 0 V
: More than 10 kΩ
: Max. 1 A
: More than 2.4 V
: Less than 0.6 V
: Less than 2 mA
: 10 kΩ
: Approx. 100 mV rms
: 100–300 mV rms
: Less than 0.3 V/5 mA
: More than 6.0 V/100 µA
q 8 V t ALC
7 6
w GND y VSEND
1
3
4
5 e HSEND u 13.8 V
2
r BAND
1
1
8